I am using SharePoint 2013, I am adding content types from existing site in a Library, I went to Library settings then clicked on add from existing site content types then it took me add content type, I chose the content types I want to add and click ok but it gives me an error, which just says an unknown error has occurred.
I have added the Libraries in a promoted link, and it is only one Library that wont add content types, the other Libraries works perfectly fine.
I have published the content types so that they can be available to other sites.
This have been happening for two days now and it is frustrating because my boss just want to see things working. please help.
attached are the images of what I am facing when I add content types.